Joint connector for fixing assembly rails

ABSTRACT

The invention relates to a connecting node ( 10 ) for fixing mounting rails ( 18, 19, 20, 21 ) in crosswise abutting relationship. To permit a timesaving mounting that can be carried out by one fitter, according to the invention the connecting node ( 10 ) is provided with a connecting device ( 14 ), which comprises an angled member ( 34 ) with two limbs ( 39, 40 ). One limb ( 40 ) of the angled member ( 34 ) is insertable into an opening ( 42 ) on the connecting node ( 10 ) and the other limb ( 39 ) is fixable to the mounting rail ( 18, 21 ) placed in a holder ( 16 ) of the connecting node ( 10 ).

The invention relates to a connecting node for fixing a mounting rail in abutting relationship to another mounting rail, having the features of the preamble to claim 1.

Mounting rails are known per se. They are usually in the form of rectangular hollow profiles having a continuous longitudinal slit on one side and often a row of holes on an opposite side. The mounting rails are firmly screwed, for example, to a ceiling, parallel to and spaced from one another, so that pipes, cables or the like running transversely to the mounting rails can be fixed in a simple manner to the mounting rails, and hence to the ceiling.

A connecting node of the kind described in the preamble for fixing mounting rails is known from DE 10 00 092 A1. The connecting node comprises as connecting device U-shaped holders, into which mounting rails can be inserted and connected to other mounting rails in abutting relationship by way of a connecting device. The connecting device consists of a U-shaped member, which engages behind undercuts arranged on the holders and permits the mounting rail to be fixed in the holder by way of a screwed connection. Laying and fixing of the mounting rails with the known connecting node requires two fitters, since until the U-shaped member is secured by screws, the connecting node offers no hold for the mounting rail to be mounted on the connecting node in abutting relationship. Furthermore, a very complicated connecting device with undercuts on the holder and a U-shaped member engaging behind the undercuts is required for fixing.

The invention is based on the problem of proposing a connecting node for such mounting rails, which permits pre-mounting of the mounting rail and a simple fixing of the mounting rail which can be effected by one fitter.

That problem is solved in accordance with the invention by the features of claim 1. The connecting node according to the invention comprises as connecting device an angled member having two limbs, wherein the one limb can be hung from an opening on the connecting node and the other limb of the angled member is fixable, for example by screwing, to the mounting rail inserted in the holder of the connecting node. Pre-fixing of the angled member to one side of the mounting rail enables one fitter to hang the latter from the connecting node by lifting the other end of the mounting rail and, by lowering it, to mount it in the U-shaped holder of the connecting node until a horizontal position on the connecting node is reached. The angled member hung from the connecting node holds the mounting rail in that position without additional support. The other end of the mounting rail forming a crossbeam is subsequently fixed to a second connecting node, which is arranged on a parallel longitudinal beam. Since the opposite end can no longer be lifted for insertion, at that end of the mounting rail prefixing of the angled member is impossible. To fix the mounting rail at that end, only the angled member is hung from the second connecting node and subsequently screwed to the mounting rail that forms the cross beam and has been placed in the U-shaped holder of the second connecting node. The connecting node according to the invention allows a time-saving mounting and fixing of mounting rails by one fitter for erection of an installation grid comprising longitudinal and cross beams, which are able to accommodate not only transverse loads but also tensile, compression and torsional forces. Installations can now be mounted on these mounting rails in so-called push-on or suspended mounting.

In one construction of the invention, the opening on the connecting node is in the form of a retaining pocket, which is formed on the connecting node for example by stamping in a stamping and bending process. The opening cross-section of the retaining pocket corresponds approximately to the cross-section of the limb of the angled member to be inserted, so that a connection secure on all sides is achieved after insertion.

To secure the angled member, the limb fixable to the mounting rail has a slot, which permits the limb to be screwed to the mounting rail.

In a preferred construction of the invention, the connecting node has two connecting devices on sides remote from one another, in order to be able to fix two mounting rails to another mounting rail in crosswise abutting relationship.

The invention is explained in detail hereinafter with reference to an exemplary embodiment illustrated in the drawing.

The connecting node 10 according to the invention illustrated in the FIGURE comprises a U-shaped middle portion 12, on the walls of the two limbs of which are arranged connecting devices 14. The connecting device 14 is formed by a U-shaped holder 16 projecting at right angles. In the exemplary embodiment illustrated, the holder 16 is about half the height of the connecting node 10 and is open at the top.

The connecting node 10 according to the invention is intended for connection of mounting rails 18, 19, 20, 21 arranged in crosswise abutting relationship. The mounting rails 18, 19, 20, 21 are in the form of rectangular hollow profiles provided with a continuous longitudinal slit 22 in one long wall and a row of holes 24 in an opposite long wall. In the exemplary embodiment illustrated, two of the mounting rails 19, 20 in the form of a longitudinal beam 26 are connected to one another with their long walls provided with the rows of holes 24 lying adjacent to one another. The connection can be effected, for example, by means of screws or rivets, optionally also by welding. The connection of the two mounting rails 19, 20 produces a stable longitudinal beam 26 with longitudinal slits 22 on the upper and under side.

For suspended fixing of the longitudinal beam 26 beneath a ceiling, not shown, a suspension anchor 28 fixed to the ceiling is connected to the longitudinal beam 26. For that purpose, the suspension anchor 28 is pushed through a hole in the cross wall of the connecting node 10. The suspension anchor 28 comprises a hammer head known per se at its end, which, set crosswise, engages behind the long wall of the mounting rail 20 provided with the longitudinal slit 22 laterally of the longitudinal slit 22. If the hammerhead is aligned, rotated through 90°, in the lengthwise direction of the mounting rail 20, it can be inserted and removed through the longitudinal slit 22 of the same. On the outside of the cross wall of the connecting node 10, a lock nut 30 is screwed onto the suspension anchor 28, with which the suspension anchor 28 is firmly clampable in the upper mounting rail 20 of the longitudinal beam 26. As long as the lock nut 30 is not tightened, the longitudinal beam 26 and the connecting node 10 can be displaced in the lengthwise direction of the longitudinal beam 26.

After suspended fixing of the longitudinal beam 26, individual mounting rails 18, 21 are inserted as cross beams 32 in the U-shaped holders 16 of the connecting node 10. The cross beams 32 are arranged at right angles to the longitudinal beams 26 abutting the same. In the exemplary embodiment illustrated, the cross beams 32 are arranged in a plane with the lower mounting rail 19 of the longitudinal beam 26.

To secure the cross beam 32 in the holder 16 of the connecting node 10 according to the invention, a screw 36, which engages through a slot 38 and the longitudinal slit 22 of the mounting rail 18, fixes an angled member 34 to the cross beam in such a way that the other limb 40 of the angled member 34 projects upwards at right angles. By lifting the opposite end of the mounting rail 18, the upwardly projecting limb 40 of the angled member 34 can be placed in the downwardly open retaining pocket 42, and by lowering the mounting rail 18, can be secured. With this securing operation, the mounting rail 18 is held in a horizontal position and secured in all directions. Simultaneously with the lowering, the opposite end of the mounting rail 18 is placed in the U-shaped holder of a connecting node that is arranged on a second longitudinal beam (not shown) running parallel and spaced by the length of the cross beam 32. At that end, the angled member 34 is not pre-mounted on the mounting rail 18, but is introduced into the retaining pocket 42 before fixing to the mounting rail. The angled member 34 lying loose after mounting on the mounting rail is then fixed to the mounting rail by the screw 36. Once both ends of the mounting rails have been connected to the connecting nodes 10 by way of the angled members 34 secured at the ends, the longitudinal beams 26 and cross beams 32 form a rigid frame, which is capable of accommodating not only transverse loads but also tensile, compression and torsional forces. Installations can now be carried out using the mounting rails 18, 19, 20, 21. In the exemplary embodiment, a push-on mounting is illustrated by way of a pipe 44, which is secured in a pipe clip 46. The pipe clip 46 is fixed in a manner known per se, by means of a hammerhead screw 48 in the longitudinal slit 22, to the upper side of the longitudinal beam 26 and tightly clamped with a lock nut 50. Until the lock nut 50 is tightened, the pipe 44 can be displaced in the lengthwise direction of the longitudinal beam 26. A push-on mounting (not shown) is possible in an analogous manner on the cross beams 32. 

1. A connecting node for fixing a mounting rail in abutting relationship to another mounting rail, the connecting node comprising as connecting device at least one holder into which the one mounting rail to be fixed to the other mounting rail in abutting relationship is insertable and connectible with the connecting node, characterised in that the connecting device (14) comprises an angled member (34) with two limbs (39, 40), the one limb (40) being insertable into an opening (42) on the connecting node (10) and the other limb (39) of the angled member (34) being fixable to the mounting rail (18, 21) placed in the holder (16) of the connecting node (10).
 2. A connecting node according to claim 1, characterised in that the opening on the connecting node (10) is in the form of a retaining pocket (42).
 3. A connecting node according to claim 1, characterised in that the limb (39) of the angled member (34) has a slot and is fixable to the mounting rail (18, 21) with a screw (36).
 4. A connecting node according to claim 1, characterised in that two connecting devices (14) are arranged on the connecting node (10) on sides remote from one another. 